5423 1st Avenue, Brooklyn
Commercial · built 2025 · Block 820, Lot 58.
Building permits
- New Building — Non-residential, filed Dec 20, 2022, estimated cost $135.2M, 6 stories, described as “Herewith filing for 6 story Ambulatory Health Care New building as per plans. Early foundation pursuant to admin code 28-104.2.5.”
- Alteration, filed Dec 16, 2025, described as “Use of suspended scaffold using the permanently installed davit system during new building construction, filed separately. Suspended scaffold shall comply with ch 33 of the NYC bc. No change in use, occupancy or egress under this…”
- Alteration, filed Jun 9, 2025, described as “Application for the installation and use of suspended scaffold as per plans filed herein. No change in egress, use, or occupancy.”
- Alteration, filed Apr 28, 2025, estimated cost $30K, described as “Installation and use of temporary contractor's shed/field office as per plans filed herewith.”
- Alteration, filed Mar 3, 2025, estimated cost $4K, described as “Installation of a temporary work platforms as per plans in conjunction with NB construction. No change in use, egress or occupancy. Work platforms to comply with 2022 NYC building code, chapter 33.”
- Alteration, filed Feb 25, 2025, estimated cost $3K, described as “Installation of a temporary material hoist as per plans in conjunction with the NB construction.no change in use, egress or occupancy. Hoist to comply with 2022 NYC building code, chapter 33”
- Alteration, filed Oct 9, 2024, estimated cost $5K, described as “Installation of a temporary roof protection as per plans. No change in use, egress or occupancy. Roof protection installed in accordance with NYC building code, chapter 33.”
- Alteration, filed Sep 27, 2024, estimated cost $15K, described as “Temporary Standpipe during construction for Ambulatory Health Care.”
- Alteration, filed Aug 15, 2024, estimated cost $20K, described as “Installation of a temporary hoist complex as per plans during NB construction. No change in use, egress or occupancy. Hoist shall comply with 2022 NYC building code, chapter 33”
- Alteration, filed May 1, 2024, estimated cost $5K, described as “Installation of a heavy duty sidewalk shed as per plans in conjunction with NB construction. No change in use, egress or occupancy. Sidewalk shed shall comply with 2022 NYC building code, chapter 33”
- Alteration, filed Apr 22, 2024, estimated cost $5K, described as “Installation of a temporary construction fence as per plans in conjunction with NB construction. No change in use, egress or occupancy. Fence to comply with 2022 NYC building code, CHAPTER33”
- Alteration, filed Jan 8, 2024, estimated cost $3K, described as “Herewith filing for new curb cut on 1ST avenue in conjuction to new building as per plans.”
- Alteration, filed Oct 18, 2023, estimated cost $10K, described as “Construction fence as per drawings during building demolition, filed sep. Construction fence shall comply with ch #33 of the NYC bc. No change in use, occupancy or egress under this application.”
- Alteration, filed Oct 18, 2023, estimated cost $5K, described as “Heavy duty sidewalk shed during NB const, filed sep. Sidewalk shed shall comply with ch #33 of the NYC bc. No change in use, occupancy or egress under this application.”
- Alteration, filed Aug 30, 2023, estimated cost $3K, described as “Herewith filing for fuel oil storage tank in conjuction to new building application. Fuel oil soley for emergency power operation. Not used for heating.”
- Alteration, filed May 16, 2023, estimated cost $3K, described as “Herewith filing sprinkler and Standpipe system in conjunction with New Building application B08050677-I1.”
- Alteration, filed Apr 17, 2023, estimated cost $15K, described as “Removal of entire sprinkler system from vacant building prior to full bulding demolition under separate applicaiton. There is no change to use, egress, occupancy, or fire protection.”
Property taxes
- Assessment
- $360,450
- 2026–27 tax
- $39,102
- Market value (city estimate)
- $801,000
- Taxable value
- $360,450
- Assessed land
- $360,450
Zoning
M1-2: floor area ratio 4.91 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.